Electromagnetic power anvil block for riveting



P. G. SIGDND, DECD.

M. SIGOND, ADMINISIRATHIX.

ELECTROMAGNETIC POWER ANVIL BLOCK FUR RIVETING.

APPLICATION FILED JAN, 4, 1921.

Patented Get. 11?,

UNITED STATES FATENT @FFHQE.

PAUL Gl-USTAV'E SIGQND, @155 SAN FRANCISCU, CALIFORNIA; MARGUERITE SENDADMINTSTRATBKX GI? SAID PAUL GUSTAVE SIGQND, DECEASED.

ELECTROMAGNETIC POWER ANVIL BLOCK TOR EIVETING.

Application filed January 4, 1921. Serial No. 435,039.

To all whom it may concern:

, Be it known that T, PAUL Gos'ravr. SreoNn, a citizen of the UnitedStates, resident of San Francisco, county of San Francisco, and State ofCalifornia, have invented a new and useful Electromagnetic Power AnvilBlock for Riveting, of which the following is a specification.

My invention relates in general to riveting devices and has referencemore particularly to an improved anvil block for such devices.

As heretofore practiced rivets are usually held by various means whiletheir opposite ends are headed, but these known devices for holding therivets are exceedingly inconvenient to use especially working an unduehardship on the one holding the rivet head against the action of theriveting tool and owing to the inconvenience thus experienced, thepresent known methods fall short of providing a practical solution ofthe problems involved.

The primary object of my invention is to provide means which, whilemanipulated to a certain extent by an operator, possesses certainfeatures which enables the same to be primarily self-operated at leastto an extent that it will not require unusual difiiculty in using thesame.

A further object of the invention is to produce a device which willenable the work to be carried out very much faster and at a greatersaving of expense than has heretofore been possible with the means nowemployed.

The invention possesses other features which will be apparent as thedescription proceeds with reference to the acompanying drawing.

In said drawing I Fi ure 1 is a vertical section on the line 11 igure 2;

Figure 2 is a top plan view;

Figure 3 is a cross section on the'lme 3-3 Figure 1 and Figure 4 is abottom plan view.

Referring now to the drawing in detail the invention in its preferredform includes an electro-magnetic anvil block and its use is more orless limited as a holding device for rivets while the opposite ends ofthe V rivets are being headed.

Ordinarily, in riveting steel plates and the 'ing rod (1-5).

like together, the operation is carried out by a riveter and his helper.One of these mechanics holds an anvil against the rivet head while theother heads over the opposite ends of the rivet with a riveting tool.

This operation usually works a hardship upon the helper and theincessant jar lIlCI- dent to holding the anvil results in physicalstrains which produce muscular and body ailments and in all is extremelytiresome work.

According to my invention all these inconveniences are done away with byproviding an electro-magnetic hold-on device which embodies in itsconstruction, a suitable "anvil block. So far as concerns, the presentembodiment (5) and (6) represent the plates which are to be rivetedtogether by a rivet (8) having a head The rivet is passed throughopenings in the plates with its opposite end adapted to be riveted overby a riveting tool such as (10). The anvil block (11) is shown asincluding a cylindrical solid piece of metal having a central depressionas at (12) made to conform to the shape or the rivet head (9) andadapted to receive the same. The opposite end of the block is rovidedwith an internal threaded opening as at (13) to receive the threaded end(14) of the connect- The connecting rod is housed within the elongatedjacket (16) with its opposite end protruding through the screw plu (17)and with a nut and washer device ('18 on the end to provide an abutment.The elongated jacket (16) is divided by the cross piece (19), the coilspring (20) housed in the upper half of the division and a second coilspring-(21) housed in the lower half. The jacket (16) forms an integrala.

part of the cover plate '(22 with the In (17) threaded therein. p g

Arranged in circular formation with their upper ends fixed to the coverplate (22) are a series of electro-magnets (23).

The lower ends of the magnets are mounted to a metal block (24) by thethreaded plugs (25). Binding posts (26) are arranged for each one of thegnets, so that an electric current may be conducted to the same. Themetal block (24) is circular in shape with its sidesdished out as shownso that its contact area or face (27 is relatively thin in crosssection.

' head (9) A suitable handle (28) may be provided for manipulating thedevice. From the above it will be seen that when the contact face (27)with the block (24) is pressed against the plates to be riveted togetherand by conducting the current to the electromagnets, the device will bemaintained against the plate by magnetic power.

The influence of the springs (20) and (21) will maintain the anvil block(11) over the of the rivet, so that the tool (10) may rivet over theopposite end of the rivet. The springs act as shock absorbers to preventthe device from becoming jar loose and in this connection it is to benoted that the tendency of the springs isto absorb the shock in twoopposite directions.

From the above it will be readily seen that the device will take theplace of the ordinary method of holding the rivet head and it will doaway with the inconvenient methods now employed.

I wish it to be understood that there must not be any limit to the formof construction v neeaeea of the tool whether it is a mechanical ormagnetic power device. 7

A suitable switch may be provided in the handle for operating the tool.

I claim:

In a device of the class described, a plurality of electro-magnetsarranged in spaced relation around a substantially cylindrical mountingincluding a contact block adapted to hold the device against a metalsurface by magnetic power, an anvil block surrounded by said magnets andadapted to bear against the head or": a rivet, said anvil block having aconnecting rod extending into an elongated jacket, a cross pieceintermediate the ends of said connecting rod, a pair of coil springs,one arranged above and below said cross piece with their opposite endsbearing against the top and bottom of said elongated jacket, said coilsprings comprising a shock absorbing means operatively associated withthe anvil block, substantially as and for the purpose described.

. PAUL GUSTAVE SIGUND.

